Indian Space Research Organisation (ISRO) directors Santhan, Anuroop, Krishnamurthy on Thursday offered prayers to Lord Balaji at the Tirumala shrine. The visit assumes significance as it comes ahead of the launch of the PSLV-C 39 today evening at the Satish Dhawan Space Center in Sriharikota. SHAR Scientists involved in the preparation of the rocket went to the temple and made special pooja in the sanctum sanctorum. After the darshan, the temple officials offered holy water and laddu prasadam to the scientists.